Katelyn E. Hall, PhD, MPH

Dr. Hall is an epidemiologist and biostatistician with over a decade of experience in environmental epidemiology, public health, biostatistics, and exposure science across the non-profit, state government, federal government, and private sectors. Dr. Hall’s strategic consulting in environmental epidemiology and biostatistics has aided both public and private sector clients in data-driven decision-making in the energy, chemical, agricultural, entertainment, waste management, and tech industries.

• Technical Director, Tontitown, Arkansas Air Sampling Study (May 2–May 12, 2025). Contracted by the Arkansas Department of Energy and Environment to design and lead an air sampling study near a landfill in Tontitown, Arkansas. The objective was to determine whether there were compounds of potential concern that the landfill was likely or possibly contributing to the community.
• Testimony-Wisconsin Electric Power Company. Provided expert epidemiology rebuttal testimony on the interpretation and use of the Environmental Protection Agency (EPA)’s Co-Benefits Risk Assessment Health Impacts Screening and Mapping Tool (COBRA) in the context of public health at the Public Service Commission of Wisconsin Hearing (Docket No. 6630-CE-317) for the Certificate of Public Convenience and Necessity for the Oak Creek Combustion Turbine Project.
• Testimony-Colorado Petroleum Association. Provided expert epidemiology and biostatistics testimony on the scientific methods of Colorado EnviroScreen at the Colorado Air Pollution Control Division Regulation 3 hearings in Denver, Colorado, on May 17, 2023.
• Testimony, CIVITAS, Resources Inc. Provided expert epidemiology and biostatistics testimony on the study design and analytic methods of the Broomfield Health Survey at the Colorado Oil and Gas Conservation Commission contested Coslette Wellpad hearings virtually, on October 26, 2022.
• Applied Public Health, Various Energy, Chemical, and Agricultural Industry Clients. Provided data-driven solutions for clients that have environmental justice concerns by designing boots-on-the-ground studies, assessments of epidemiology literature, and risk communication of the science.

• In the Superior Court, County of Kern, State of California Aera Energy, LLC and Chevron U.S.A. Inc. v. Gavin Newsom et al. Case Nos. BCV-22-100748 and BCV-22-100636. Deposition Monday, January, 12, 2026 Trial Testimony Thursday, January 29, 2026.

• Hall KE, Miller M, Costa A, and Mahoney L. Tontitown, Arkansas Air Sampling Study: May 2, 2025 to May 12, 2025. 2025 September. Arkansas Energy & Environment, Environmental Quality https://www.adeq.state.ar.us/tontitown/.

• Crawford KA, Gardner JA, Meyer EA, Hall KE, Gary DS, Esser MB. Current marijuana use and alcohol consumption among adults following the legalization of nonmedical retail marijuana sales — Colorado, 2015-2019. CDC Weekly. 2021 October; 70(43);1505-1508. https://www.cdc.gov/mmwr/volumes/70/wr/mm7043a3.htm?s_ cid=mm7043a3_w.

• Hall KE. Evaluation of Cannabis ICD-10-CM Codes’ Performance to Predict Emergency Department Visits Partially Attributable to Cannabis. 2020 August. University of Colorado, Anschutz Medical Campus. https://dl.acm.org/doi/10.5555/AAI28086241.

• Shelton SK, Mills E, Saben JL, Devivo M, Williamson K, Abbott D, Hall KE, Monte AA. Why do patients come to the emergency department after using cannabis? Clin Toxicol (Phila). 2020 Jun;58(6):453-459. doi: 10.1080/15563650.2019.1657582. Epub 2019 Sep 16. PMID: 31526057; PMCID: PMC7073292.

• Hall KE, Yang H, Contreras AE, James KA. Cannabis Coding in Colorado during the ICD-10-CM Transition. Injury Prevention 2021;27:i66-i70. https://injuryprevention.bmj.com/content/27/S1/i66.